wscript: make python 3.x print function available to python2.6

Instead of rewriting all end=' ' statements, we can import the new print
function in python-2.6.0a2 or newer. Should be "old enough".

wscript

@@ -1,5 +1,6 @@
 #! /usr/bin/env python
 # encoding: utf-8
+from __future__ import print_function
 
 import os
 import Utils